Circle, rod hafnium GFI-1
Supplier — Avec Glob Company — offers at affordable prices from the manufacturer bars and a circle of hafnium GPI-1. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Hafnium circle and rod grade GFI-1 vacuum remelting are made in accordance with TU 48−4-502−88. The main admixture in hafnium is zirconium. Hafnium is plastic, and has a characteristic silvery sheen. The metal has a close-packed hexagonal crystal structure. It has excellent mechanical properties and has extremely good corrosion resistance. However, its properties are largely influenced by the degree of zirconium impurity.
The fine powder of hafnium is pyrophoric and can spontaneously ignite in the air. Hafnium GPI-1 is resistant to concentrated alkalis, but reacts with oxygen, nitrogen, carbon, boron, sulfur and silicon, as well as with halogens at elevated temperatures.
Urgency of application
Hafnium GPI-1 has a good absorption cross section for thermal neutrons (approximately 600 times greater than that of zirconium). Therefore, a rod and a circle of hafnium grade GFI-1 are actively used in the manufacture of control rods in nuclear reactors. Other practical applications of hafnium are gas-filled lamps and incandescent lamps, as well as getters for oxygen and nitrogen.
Hafnium grade GPI-1 contains up to 99.5% zirconium and hafnium, while the content of zirconium should not exceed 1%. Of the other impurities present in the hafnium rods and the circle, it is necessary to isolate sulfur, aluminum, scandium, iron, molybdenum, niobium, tantalum and silicon.
Physical and mechanical properties
- Density, kg / m 3 — 13100;
- Melting point, 0 С — 4215;
- Modulus of elasticity, GPa — 206;
- Coefficient of thermal conductivity at room temperature, W / mdg — 9;
- The limit of temporary resistance, MPa — 365… 380;
- Limit of plasticity, MPa — 180… 190;
- Relative elongation at tension,% — 31… 42;
- Hardness according to Brinell, HB, not more — 131.
Assortment and application features
Forged circle and rod made of hafnium grade GFI-1 are supplied with a diameter from 3 to 50 mm, length from 50 to 500 mm. By individual order, it is possible to produce bars and a circle of longer length. To increase ductility, the bulk hafnium rolling before forging is subjected to recrystallization annealing. With a diameter of rods / wheels above 15 mm, the material is machined.
Supplier — the company AvekGlob — offers to buy a circle or rod made of hafnium grade GFI-1 in a wide range of diameters and lengths. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.